The number of orbitals associated with quantum numbers
Question:

The number of orbitals associated with quantum numbers $n=5, m_{s}=+\frac{1}{2}$ is:

1. 11

2. 25

3. 50

4. 15

Correct Option: , 2

Solution:

The possible number of orbitals in a shell in term of ‘ $n$ ‘ is $n^{2}$

$\therefore n=5 ; n^{2}=25$